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Energy efficiency
Industry: Energy
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Energy efficiency
Absorption coefficient
Energy; Energy efficiency
In reference to a solar energy conversion devices, the degree to which a substance will absorb solar energy. In a solar photovoltaic device, the factor by which photons are absorbed as they travel a ...
Swept area
Energy; Energy efficiency
In reference to a wind energy conversion device, the area through which the rotor blades spin, as seen when directly facing the centre of the rotor blades.
Solidity
Energy; Energy efficiency
In reference to a wind energy conversion device, the ratio of rotor blade surface area to the frontal, swept area that the rotor passes through.
Tip speed ratio
Energy; Energy efficiency
In reference to a wind energy conversion device's blades, the difference between the rotational speed of the tip of the blade and the actual velocity of the wind.
Feather
Energy; Energy efficiency
In a wind energy conversion system, to pitch the turbine blades so as to reduce their lift capacity as a method of shutting down the turbine during high wind speeds.
Cycle
Energy; Energy efficiency
In alternating current, the current goes from zero potential or voltage to a maximum in one direction, back to zero, and then to a maximum potential or voltage in the other direction. The number of ...
Ground loop
Energy; Energy efficiency
In geothermal heat pump systems, a series of fluid-filled plastic pipes buried in the shallow ground, or placed in a body of water, near a building. The fluid within the pipes is used to transfer ...
